I am 23 and have recently been treated for a recurrence of salivary gland cancer. I have had four surgeries, and have recently finished radiation. About a month following treatment I noticed a tingling sensation through my legs why I put my head down. The docs say it is a rare condition sometimes related to radiation to the neck. They can't believe I show these signs though, since I had radiation to only one side. Sometimes I feel like my legs will give out when I put my head down. Feels like an electric shock through my legs. Anyone else with this unusual complication? When does it go away?